mirror of
https://github.com/matrix-construct/construct
synced 2024-07-01 16:28:19 +02:00
81 lines
2.6 KiB
C++
81 lines
2.6 KiB
C++
// Matrix Construct
|
|
//
|
|
// Copyright (C) Matrix Construct Developers, Authors & Contributors
|
|
// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
|
|
//
|
|
// Permission to use, copy, modify, and/or distribute this software for any
|
|
// purpose with or without fee is hereby granted, provided that the above
|
|
// copyright notice and this permission notice is present in all copies. The
|
|
// full license for this software is available in the LICENSE file.
|
|
|
|
#pragma once
|
|
#define HAVE_IRCD_BUFFER_MUTABLE_BUFFER_H
|
|
|
|
/// Base for mutable buffers, or buffers which can be written to because they
|
|
/// are not const.
|
|
///
|
|
struct ircd::buffer::mutable_buffer
|
|
:buffer<char *>
|
|
{
|
|
// The definition for this is somewhere in one of the .cc files.
|
|
/// Conversion offered for the analogous asio buffer.
|
|
operator boost::asio::mutable_buffer() const;
|
|
|
|
/// Allows boost::spirit to append to the buffer; this means the size() of
|
|
/// this buffer becomes a consumption counter and the real size of the buffer
|
|
/// must be kept separately. This is the lowlevel basis for a stream buffer.
|
|
void insert(char *const &it, const value_type &v);
|
|
|
|
using buffer<char *>::buffer;
|
|
template<size_t SIZE> mutable_buffer(char (&buf)[SIZE]);
|
|
template<size_t SIZE> mutable_buffer(std::array<char, SIZE> &buf);
|
|
mutable_buffer(const std::function<void (const mutable_buffer &)> &);
|
|
explicit mutable_buffer(std::string &buf);
|
|
mutable_buffer(const buffer<char *> &b);
|
|
mutable_buffer() = default;
|
|
};
|
|
|
|
inline
|
|
__attribute__((always_inline))
|
|
ircd::buffer::mutable_buffer::mutable_buffer(const buffer<char *> &b)
|
|
:buffer<char *>{b}
|
|
{}
|
|
|
|
/// lvalue string reference offered to write through to a std::string as
|
|
/// the buffer. should be hard to bind by accident...
|
|
inline
|
|
__attribute__((always_inline))
|
|
ircd::buffer::mutable_buffer::mutable_buffer(std::string &buf)
|
|
:mutable_buffer{const_cast<char *>(buf.data()), buf.size()}
|
|
{}
|
|
|
|
inline
|
|
__attribute__((always_inline))
|
|
ircd::buffer::mutable_buffer::mutable_buffer(const std::function<void (const mutable_buffer &)> &closure)
|
|
{
|
|
closure(*this);
|
|
}
|
|
|
|
template<size_t SIZE>
|
|
inline __attribute__((always_inline, gnu_inline))
|
|
ircd::buffer::mutable_buffer::mutable_buffer(char (&buf)[SIZE])
|
|
:buffer<char *>{buf, SIZE}
|
|
{}
|
|
|
|
template<size_t SIZE>
|
|
inline __attribute__((always_inline))
|
|
ircd::buffer::mutable_buffer::mutable_buffer(std::array<char, SIZE> &buf)
|
|
:buffer<char *>{buf.data(), SIZE}
|
|
{}
|
|
|
|
inline void
|
|
ircd::buffer::mutable_buffer::insert(char *const &it,
|
|
const value_type &v)
|
|
{
|
|
assert(it >= this->begin() && it <= this->end());
|
|
memmove(it + 1, it, std::distance(it, this->end()));
|
|
*it = v;
|
|
++std::get<1>(*this);
|
|
}
|
|
|